矿床地质2017，Vol.36Issue(4)：879-892,14.DOI:10.16111/j.0258-7106.2017.04.006
湖南尖峰岭稀有金属花岗岩地球化学特征及成矿作用
Geochemical features and mineralization of Jianfengling rare metal granite in Hunan Province
摘要
Abstract
The Jianfengling deposit,which is located in Linwu County of Hunan Province,is a typical granite-type Nb-Ta-Li ore deposit.Analysis of major elements,trace elements and volatiles of albite granite and greisens was carried out by using XRF,ICP-MS and ISE methods in order to investigate granite metallogenesis and further to give assistance for exploring rare metal ore prospective areas in southeastern Hunan Province.The results show that the albite granites and greisens are characterized by high values of SiO2 (70.6 ％ ～ 84.85 ％),Al2O3 (9.36 ％～ 22.99 ％),A/CNK ＞ 1.0 and F (2.43 ％ ～ 3.74 ％),large range content of Na2O + K2O (1.51％ ～ 7.52 ％) and CaO 0.1％ ～ 3.44 ％),and extremely low content of Fe2O3,MgO,TiC2,MnO and P2O5,with significant Eu anomalies and m-type tetrad effects.They are strongly enriched in Rb,Th,U,Nb and Ta,but depleted in Ba,Sr and Ti elements.All these characteristics show that these granites were formed through high differentiation of magma and magma immiscibility.It is believed that rare metals enrichment and melt-fluid geochemical behavior and ore-forming effect were attributed to such restrictive functions as volatile F,the unmixing of magma,water-rock reaction and weathering leaching process,which led to rare metals enrichment in albite granites and greisens to form ore deposit.关键词
地球化学/铌-钽-锂/钠长石花岗岩/云英岩/富F花岗岩/尖峰岭Key words
geochemistry/Nb-Ta-Li/albite granite/greisens/F enrichment granite/Jianfengling分类
天文与地球科学引用本文复制引用
文春华,邵拥军,黄革非,罗小亚,李胜苗..湖南尖峰岭稀有金属花岗岩地球化学特征及成矿作用[J].矿床地质,2017,36(4):879-892,14.基金项目
本文得到华南重点矿集区稀有稀散和稀土矿产调查项目(编号:DD20160056),中南大学博士后课题,湖南省自然科学基金(编号:2017JJ3138)、湖南省地质矿产勘查开发局科研项目(编号:201703-02)和深地资源勘查开采重点专项(2017YFC0602402)联合资助 （编号:DD20160056）
